摘要
以带油腔的高速动压径向滑动轴承为研究对象,基于层流、紊流润滑理论,建立了层流、紊流同时存在于同一轴承油膜时的滑动轴承静态特性二维模型;分析不同轴颈转速下油膜内雷诺数、压力、温度的分布以及承载力、摩擦力、侧泄量等静态特性的变化;并将结果与无腔圆柱轴承和单一流态下的计算结果进行对比.结果表明:在动压滑动轴承流场计算中,必须首先正确判定油膜流态及计入温黏关系;由于油腔的存在,混合流态下油膜雷诺数、压力分布曲线呈现明显的阶梯性;与相同条件的无腔轴承相比,开设油腔会小幅降低承载力,但同时会减少摩擦和降低温升,综合性能较优.
A two-dimensional numerical model based on classic laminar and turbulent lubrication theory is established to investigate the static characteristic of the high-speed hydrodynamic journal bearing with oil recesses. By means of this model the influences of spindle rotation speed on static characteristics such as Reynolds number, pressure, temperature distribution, carrying capacity, friction and temperature rise are discussed in detail. These results are also compared with those under the sole flow regime and those of bearing without recesses under the complex flow regime. The results show that reasonable determination about flow regime and temperature-iscosity relationship must be indispensable; the curves of Reynolds number and pressure field display a stair-step shape; the bearing with recesses not only lowers the load carrying capacity but also decreases, friction and temperature rise. This is different from those without recesses.
出处
《内蒙古大学学报（自然科学版）》
CAS
CSCD
北大核心
2014年第6期616-622,共7页
Journal of Inner Mongolia University：Natural Science Edition
基金
国家自然科学基金资助项目(51075373)
河南省基础与前沿技术研究计划项目(132300410068)
关键词
滑动轴承
油腔
层流
紊流
混合流态
静态特性
journal bearing oil recess laminar flow turbulence flow
complex flow regime
staticcharacteristics
